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Finding the Fourth Proportional to 792.18, 1,190.07 and 631.80

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Solution

The fourth proportional to 792.18, 1,190.07 and 631.80 is: 949.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    792.18 : 1,190.07 = 631.80 : x
  2. Step 2: Convert to fraction form
    792.18/1,190.07 = 631.80/x
  3. Step 3: Cross multiply
    792.18x = 1,190.07 × 631.80
  4. Step 4: Simplify right side
    792.18x = 751,886.23
  5. Step 5: Solve for x
    x = 751,886.23/792.18
  6. Step 6: Final answer
    x = 949.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.